<template>
  <div class="login_container">
    <!-- logo区域 -->
    <div class="login_box">
      <div class="logo-img">
        <img src="../assets/logo.png" alt />
      </div>
      <!-- 登录表单区域 -->
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 登录密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            type="password"
            prefix-icon="iconfont icon-3702mima"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: "",
  data() {
    return {
      //登录表单数据对象
      loginForm: {
        username: "",
        password: ""
      },
      //表单验证规则对象
      loginFormRules: {
        //验证用户名是否合法
        username: [
          { required: true, message: "请输入登录名", trigger: "blur" },
          { min: 3, max: 10, message: "长度在 3 到 10 个字符", trigger: "blur" }
        ],
        password: [
          { required: true, message: "请输入登录密码", trigger: "blur" },
          { min: 6, max: 15, message: "长度在 6 到 15 个字符", trigger: "blur" }
        ]
      }
    };
  },

  methods: {
    //重置登录表单数据
    resetLoginForm() {
      //   console.log(this);
      this.$refs.loginFormRef.resetFields();
    },
    //登录预验证
    login() {
      this.$refs.loginFormRef.validate(async val_id => {
        //返回的是布尔值，效验成功则发起请求登录接口
        //console.log(val_id);
        if (!val_id) return;
        const { data: res } = await this.$http.post("login", this.loginForm);
        //console.log(res);
        if (res.meta.status !== 200) return this.$message.error("登录失败！");
        this.$message.success("登录成功！");
        //将登录成功后的token,保存到客户端的sessionStorage中
        //1:项目中除了登录之外的其他API接口，必须登录之后才能访问
        //2:token只应在当前网站打开期间生效，所以将token保存到sessionStorage
        window.sessionStorage.setItem("token", res.data.token);
        //通过router.push跳转到主页home中
        this.$router.push("/home");
      });
    }
  }
};
</script>

<style lang="less" scoped>
.login_container {
  height: 100%;
  background-image: url("../assets/images/login-bg.jpg");
  background-size: 100%;
  background-repeat: no-repeat;
  color: #fff;
}
.login_box {
  width: 500px;
  height: 366px;
  background-color: #fff;
  border-radius: 5px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  .logo-img {
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    background: #fff;
    box-shadow: 0 0 10px #ddd;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      border: 1px solid #eee;
      background: #eee;
    }
  }
}
.login_form {
  position: absolute;
  width: 100%;
  bottom: 50px;
  padding: 0 50px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  margin-top: 45px;
  justify-content: flex-end;
}
</style>